There are
1,323 mi
from Provo, UT to St Charles, MO
That's the driving distance. It would take 23 hours 3 mins to go from Provo, Utah to St Charles, Missouri.
The flight distance (direct flight from Provo, UT to St Charles, MO) is 1,128.99 mi.
1,323 mi = 1.61 kms